I found the contrast to be very weird at first. However, at the end of video, as the last lyrics echoed, I think I had an inkling of the reason behind the jaggedness of the movements - it's supposed to counter the peaceful song, alluding to the other half of waiting: the restlessness, the impatience, the wild desire to reach out and follow instead of just simply waiting.
I dunno. It's my take on it. I like how minimalist it is. Something definitely new and high art.